WBJEE · Maths · Straight Lines
The equations of the lines through \((1,1)\) and making angles of \(45^{\circ}\) with the line \(x+y=0\) are
- A \(x-1=0, x-y=0\)
- B \(x-y=0, y-1=0\)
- C \(x+y-2=0, y-1=0\)
- D \(\mathrm{x}-1=0, \mathrm{y}-1=0\)
Answer & Solution
Correct Answer
(D) \(\mathrm{x}-1=0, \mathrm{y}-1=0\)
Step-by-step Solution
Detailed explanation
Hints : \(m=1, y-1=\frac{m \pm \tan 45}{1 \mp m \tan 45}(x-1), y-1=\frac{(-1) \pm 1}{1 \pm 1}(x-1)\) \(y=1, x=1\)
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